Pinal County Climate
Pinal County, Arizona
Avg Annual Temp
70.1°F
Annual Precip
11.1"
Annual Snowfall
0.9"
Extreme Heat Days
157.3181818181818
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Pinal County Weather
Extreme Heat in the Arizona Lowlands
Pinal County is one of the warmest places in the nation, with an annual average temperature of 70.1°F. This is more than 15 degrees higher than the national median, accompanied by a dry 11.1 inches of annual precipitation.
Well Above the Arizona Norm
Pinal County’s 70.1°F average temperature makes it significantly hotter than the state average of 63.5°F. It ranks as one of the warmest counties in Arizona, driven by intense low-elevation sun.
Bridging the Gap Between Yuma and Pima
Pinal is warmer than Pima County (68.1°F) but offers a slight reprieve compared to Yuma's 74.1°F. Its 11.1 inches of rain is fairly standard for the central Arizona corridor but triple what Yuma receives.
Dominated by Five Months of Heat
The county endures 157 days of temperatures over 90°F, creating a very long summer season. July averages 89.5°F, while winters are virtually snow-free with a January average of 52.0°F.
Extreme Heat Protection is Mandatory
With 157 extreme heat days, high-performance HVAC and home insulation are the most critical investments for residents. Outdoor activities should be limited to the early morning during the July peak to avoid the 89.5°F daily average.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.